OEM Lennox Silicon Carbide Hot Surface Ignitor 5.25" Molex — 87X85

The 87X85 is a genuine OEM Lennox silicon carbide hot surface ignitor with a 5.25" lead and a Molex side-lock connector fitted with 0.092" male pins. This ignitor is the heart of your Lennox furnace's ignition system — on each heat call it glows red-hot to light the main burners, then steps aside as the flame establishes. A properly matched connector ensures a secure, positive electrical connection to the furnace harness.

Common failure symptoms: the furnace attempts to light but never fires, repeated ignition lockouts, cold air blowing from registers, an ignitor that no longer glows, or visible cracks and pitting in the silicon carbide element.

Silicon carbide ignitors are consumable wear items that become increasingly brittle with age and thermal stress. Fitting the OEM Lennox 87X85 delivers the exact glow temperature, resistance, and side-lock connector geometry your furnace was engineered for — avoiding the timing mismatches and premature failures common with universal substitutes. Get back to reliable heat with a true factory replacement.